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<tr class="t-nv"><td colspan="5"> <a href="unordered_map.html" title="cpp/header/unordered map"><tt>&lt;unordered_map&gt;</tt></a></td></tr>
<tr class="t-nv"><td colspan="5"> <a href="unordered_set.html" title="cpp/header/unordered set"><tt>&lt;unordered_set&gt;</tt></a></td></tr>
<tr class="t-nv"><td colspan="5"> <a href="stack.html" title="cpp/header/stack"><tt>&lt;stack&gt;</tt></a></td></tr>
</table></div></td></tr>
<tr class="t-nv-h2"><td colspan="5"> 迭代器</td></tr>
<tr class="t-nv"><td colspan="5"> <a href="iterator.html" title="cpp/header/iterator"><tt>&lt;iterator&gt;</tt></a></td></tr>
<tr class="t-nv-h2"><td colspan="5"> 范围</td></tr>
<tr class="t-nv"><td colspan="5"> <a href="ranges.html" title="cpp/header/ranges"><tt>&lt;ranges&gt;</tt></a></td></tr>
<tr class="t-nv-h2"><td colspan="5"> 算法</td></tr>
<tr class="t-nv-col-table"><td><div><table class="t-nv-begin" cellpadding="0" style="line-height:1.1em">
<tr class="t-nv"><td colspan="5"> <a href="algorithm.html" title="cpp/header/algorithm"><tt>&lt;algorithm&gt;</tt></a></td></tr>
</table></div></td><td><div><table class="t-nv-begin" cellpadding="0" style="line-height:1.1em">
<tr class="t-nv"><td colspan="5"> <a href="execution.html" title="cpp/header/execution"><tt>&lt;execution&gt;</tt></a></td></tr>
</table></div></td></tr>
<tr class="t-nv-h2"><td colspan="5"> 数值</td></tr>
<tr class="t-nv-col-table"><td><div><table class="t-nv-begin" cellpadding="0" style="line-height:1.1em">
<tr class="t-nv"><td colspan="5"> <a href="complex.html" title="cpp/header/complex"><tt>&lt;complex&gt;</tt></a></td></tr>
<tr class="t-nv"><td colspan="5"> <a href="random.html" title="cpp/header/random"><tt>&lt;random&gt;</tt></a></td></tr>
</table></div></td><td><div><table class="t-nv-begin" cellpadding="0" style="line-height:1.1em">
<tr class="t-nv"><td colspan="5"> <a href="valarray.html" title="cpp/header/valarray"><tt>&lt;valarray&gt;</tt></a></td></tr>
<tr class="t-nv"><td colspan="5"> <a href="numeric.html" title="cpp/header/numeric"><tt>&lt;numeric&gt;</tt></a></td></tr>
</table></div></td><td><div><table class="t-nv-begin" cellpadding="0" style="line-height:1.1em">
<tr class="t-nv"><td colspan="5"> <a href="bit.html" title="cpp/header/bit"><tt>&lt;bit&gt;</tt></a></td></tr>
<tr class="t-nv"><td colspan="5"> <a href="numbers.html" title="cpp/header/numbers"><tt>&lt;numbers&gt;</tt></a></td></tr>
</table></div></td><td><div><table class="t-nv-begin" cellpadding="0" style="line-height:1.1em">
<tr class="t-nv"><td colspan="5"> <a href="cfenv.html" title="cpp/header/cfenv"><tt>&lt;cfenv&gt;</tt></a></td></tr>
<tr class="t-nv"><td colspan="5"> <a href="cmath.html" title="cpp/header/cmath"><tt>&lt;cmath&gt;</tt></a></td></tr>
</table></div></td></tr>
<tr class="t-nv-h2"><td colspan="5"> 输入/输出</td></tr>
<tr class="t-nv-col-table"><td><div><table class="t-nv-begin" cellpadding="0" style="line-height:1.1em">
<tr class="t-nv"><td colspan="5"> <a href="iosfwd.html" title="cpp/header/iosfwd"><tt>&lt;iosfwd&gt;</tt></a></td></tr>
<tr class="t-nv"><td colspan="5"> <a href="ios.html" title="cpp/header/ios"><tt>&lt;ios&gt;</tt></a></td></tr>
<tr class="t-nv"><td colspan="5"> <a href="iomanip.html" title="cpp/header/iomanip"><tt>&lt;iomanip&gt;</tt></a></td></tr>
<tr class="t-nv"><td colspan="5"> <a href="streambuf.html" title="cpp/header/streambuf"><tt>&lt;streambuf&gt;</tt></a></td></tr>
</table></div></td><td><div><table class="t-nv-begin" cellpadding="0" style="line-height:1.1em">
<tr class="t-nv"><td colspan="5"> <a href="istream.html" title="cpp/header/istream"><tt>&lt;istream&gt;</tt></a></td></tr>
<tr class="t-nv"><td colspan="5"> <a href="ostream.html" title="cpp/header/ostream"><tt>&lt;ostream&gt;</tt></a></td></tr>
<tr class="t-nv"><td colspan="5"> <a href="iostream.html" title="cpp/header/iostream"><tt>&lt;iostream&gt;</tt></a></td></tr>
<tr class="t-nv"><td colspan="5"> <br>
</td></tr>
</table></div></td><td><div><table class="t-nv-begin" cellpadding="0" style="line-height:1.1em">
<tr class="t-nv"><td colspan="5"> <a href="sstream.html" title="cpp/header/sstream"><tt>&lt;sstream&gt;</tt></a></td></tr>
<tr class="t-nv"><td colspan="5"> <a href="spanstream.html" title="cpp/header/spanstream"><tt>&lt;spanstream&gt;</tt></a></td></tr>
<tr class="t-nv"><td colspan="5"> <a href="fstream.html" title="cpp/header/fstream"><tt>&lt;fstream&gt;</tt></a></td></tr>
<tr class="t-nv"><td colspan="5"> <a href="syncstream.html" title="cpp/header/syncstream"><tt>&lt;syncstream&gt;</tt></a></td></tr>
</table></div></td><td><div><table class="t-nv-begin" cellpadding="0" style="line-height:1.1em">
<tr class="t-nv"><td colspan="5"> <a href="cstdio.html" title="cpp/header/cstdio"><tt>&lt;cstdio&gt;</tt></a></td></tr>
<tr class="t-nv"><td colspan="5"> <a href="cinttypes.html" title="cpp/header/cinttypes"><tt>&lt;cinttypes&gt;</tt></a></td></tr>
<tr class="t-nv"><td colspan="5"> <a href="strstream.html" title="cpp/header/strstream"><tt>&lt;strstream&gt;</tt></a></td></tr>
<tr class="t-nv"><td colspan="5"> <br>
</td></tr>
</table></div></td></tr>
<tr class="t-nv-h2"><td colspan="5"> 正则表达式</td></tr>
<tr class="t-nv"><td colspan="5"> <strong class="selflink"><tt>&lt;regex&gt;</tt></strong></td></tr>
<tr class="t-nv-h2"><td colspan="5"> 文件系统</td></tr>
<tr class="t-nv"><td colspan="5"> <a href="filesystem.html" title="cpp/header/filesystem"><tt>&lt;filesystem&gt;</tt></a></td></tr>
<tr class="t-nv-h2"><td colspan="5"> 线程支持</td></tr>
<tr class="t-nv-col-table"><td><div><table class="t-nv-begin" cellpadding="0" style="line-height:1.1em">
<tr class="t-nv"><td colspan="5"> <a href="thread.html" title="cpp/header/thread"><tt>&lt;thread&gt;</tt></a></td></tr>
<tr class="t-nv"><td colspan="5"> <a href="atomic.html" title="cpp/header/atomic"><tt>&lt;atomic&gt;</tt></a></td></tr>
<tr class="t-nv"><td colspan="5"> <a href="mutex.html" title="cpp/header/mutex"><tt>&lt;mutex&gt;</tt></a></td></tr>
</table></div></td><td><div><table class="t-nv-begin" cellpadding="0" style="line-height:1.1em">
<tr class="t-nv"><td colspan="5"> <a href="shared_mutex.html" title="cpp/header/shared mutex"><tt>&lt;shared_mutex&gt;</tt></a></td></tr>
<tr class="t-nv"><td colspan="5"> <a href="condition_variable.html" title="cpp/header/condition variable"><tt>&lt;condition_variable&gt;</tt></a>    </td></tr>
<tr class="t-nv"><td colspan="5"> <a href="future.html" title="cpp/header/future"><tt>&lt;future&gt;</tt></a></td></tr>
</table></div></td><td><div><table class="t-nv-begin" cellpadding="0" style="line-height:1.1em">
<tr class="t-nv"><td colspan="5"> <a href="stop_token.html" title="cpp/header/stop token"><tt>&lt;stop_token&gt;</tt></a></td></tr>
<tr class="t-nv"><td colspan="5"> <a href="semaphore.html" title="cpp/header/semaphore"><tt>&lt;semaphore&gt;</tt></a></td></tr>
<tr class="t-nv"><td colspan="5"> <br>
</td></tr>
</table></div></td><td><div><table class="t-nv-begin" cellpadding="0" style="line-height:1.1em">
<tr class="t-nv"><td colspan="5"> <a href="latch.html" title="cpp/header/latch"><tt>&lt;latch&gt;</tt></a></td></tr>
<tr class="t-nv"><td colspan="5"> <a href="barrier.html" title="cpp/header/barrier"><tt>&lt;barrier&gt;</tt></a></td></tr>
<tr class="t-nv"><td colspan="5"> <br>
</td></tr>
</table></div></td></tr>
<tr class="t-nv-h2"><td colspan="5"> C 兼容</td></tr>
<tr class="t-nv-col-table"><td><div><table class="t-nv-begin" cellpadding="0" style="line-height:1.1em">
<tr class="t-nv"><td colspan="5"> <a href="ciso646.html" title="cpp/header/ciso646"><tt>&lt;ciso646&gt;</tt></a></td></tr>
<tr class="t-nv"><td colspan="5"> <a href="cstdalign.html" title="cpp/header/cstdalign"><tt>&lt;cstdalign&gt;</tt></a></td></tr>
</table></div></td><td><div><table class="t-nv-begin" cellpadding="0" style="line-height:1.1em">
<tr class="t-nv"><td colspan="5"> <a href="cstdbool.html" title="cpp/header/cstdbool"><tt>&lt;cstdbool&gt;</tt></a></td></tr>
<tr class="t-nv"><td colspan="5"> <a href="ccomplex.html" title="cpp/header/ccomplex"><tt>&lt;ccomplex&gt;</tt></a></td></tr>
</table></div></td><td><div><table class="t-nv-begin" cellpadding="0" style="line-height:1.1em">
<tr class="t-nv"><td colspan="5"> <a href="ctgmath.html" title="cpp/header/ctgmath"><tt>&lt;ctgmath&gt;</tt></a></td></tr>
<tr class="t-nv"><td colspan="5"> <a href="stdatomic.h.html" title="cpp/header/stdatomic.h"><tt>&lt;stdatomic.h&gt;</tt></a></td></tr>
</table></div></td></tr>
</table></div><div></div></div></div></div><div class="t-navbar-sep"> </div></div>
<p>此头文件是<a href="../regex.html" title="cpp/regex">正则表达式</a>库的一部分。
</p>
<table class="t-dsc-begin">

<tr>
<td colspan="2"> <h3> <span class="mw-headline" id=".E5.8C.85.E5.90.AB">包含</span></h3>
</td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="compare.html" title="cpp/header/compare"> <span class="t-lines"><span>&lt;compare&gt;</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx20">(C++20)</span></span></span></div></div>
</td>
<td>  <a href="../language/operator_comparison.html#.E4.B8.89.E8.B7.AF.E6.AF.94.E8.BE.83" title="cpp/language/operator comparison">三路比较运算符</a>支持 </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="initializer_list.html" title="cpp/header/initializer list"> <span class="t-lines"><span>&lt;initializer_list&gt;</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div></div>
</td>
<td>  <span class="t-lc"><a href="../utility/initializer_list.html" title="cpp/utility/initializer list">std::initializer_list</a></span> 类模板 </td></tr>

<tr>
<td colspan="2"> <h3> <span class="mw-headline" id=".E7.B1.BB">类</span></h3>
</td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="../regex/basic_regex.html" title="cpp/regex/basic regex"> <span class="t-lines"><span>basic_regex</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div></div>
</td>
<td>  正则表达式对象 <br> <span class="t-mark">(类模板)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="../regex/sub_match.html" title="cpp/regex/sub match"> <span class="t-lines"><span>sub_match</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div></div>
</td>
<td>  标识子表达式所匹配的字符序列 <br> <span class="t-mark">(类模板)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="../regex/match_results.html" title="cpp/regex/match results"> <span class="t-lines"><span>match_results</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div></div>
</td>
<td>  标识一个正则表达式匹配，包含所有子表达式匹配 <br> <span class="t-mark">(类模板)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="../regex/regex_iterator.html" title="cpp/regex/regex iterator"> <span class="t-lines"><span>regex_iterator</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div></div>
</td>
<td>  迭代一个字符序列中的所有正则表达式匹配 <br> <span class="t-mark">(类模板)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="../regex/regex_token_iterator.html" title="cpp/regex/regex token iterator"> <span class="t-lines"><span>regex_token_iterator</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div></div>
</td>
<td>  迭代给定字符串中的所有正则表达式匹配中的指定子表达式，或迭代未匹配的子字符串  <br> <span class="t-mark">(类模板)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="../regex/regex_error.html" title="cpp/regex/regex error"> <span class="t-lines"><span>regex_error</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div></div>
</td>
<td>   报告正则表达式库生成的错误 <br> <span class="t-mark">(类)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="../regex/regex_traits.html" title="cpp/regex/regex traits"> <span class="t-lines"><span>regex_traits</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div></div>
</td>
<td>  提供正则表达式库所需的关于字符类型的元信息 <br> <span class="t-mark">(类模板)</span> </td></tr>

<tr>
<td colspan="2"> <h5> <span class="mw-headline" id="regex_.E5.B8.B8.E9.87.8F.E7.B1.BB.E5.9E.8B"> regex 常量类型 </span></h5>
</td></tr>

<tr class="t-dsc-header">
<td colspan="2"> <div>定义于命名空间 <code>std::regex_constants</code></div>
</td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="../regex/syntax_option_type.html" title="cpp/regex/syntax option type"> <span class="t-lines"><span>syntax_option_type</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div></div>
</td>
<td>  控制正则表达式行为的通用选项 <br> <span class="t-mark">(typedef)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="../regex/match_flag_type.html" title="cpp/regex/match flag type"> <span class="t-lines"><span>match_flag_type</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div></div>
</td>
<td>  特定于匹配的选项 <br> <span class="t-mark">(typedef)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="../regex/error_type.html" title="cpp/regex/error type"> <span class="t-lines"><span>error_type</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div></div>
</td>
<td>  描述不同类型的匹配错误 <br> <span class="t-mark">(typedef)</span> </td></tr>

<tr>
<td colspan="2"> <h3> <span class="mw-headline" id=".E5.87.BD.E6.95.B0">函数</span></h3>
</td></tr>

<tr>
<td colspan="2"> <h5> <span class="mw-headline" id=".E7.AE.97.E6.B3.95"> 算法 </span></h5>
</td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="../regex/regex_match.html" title="cpp/regex/regex match"> <span class="t-lines"><span>regex_match</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div></div>
</td>
<td>  尝试匹配一个正则表达式到整个字符序列 <br> <span class="t-mark">(函数模板)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="../regex/regex_search.html" title="cpp/regex/regex search"> <span class="t-lines"><span>regex_search</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div></div>
</td>
<td>  尝试匹配一个正则表达式到字符序列的任何部分 <br> <span class="t-mark">(函数模板)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="../regex/regex_replace.html" title="cpp/regex/regex replace"> <span class="t-lines"><span>regex_replace</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div></div>
</td>
<td>   以格式化的替换文本来替换正则表达式匹配的出现位置  <br> <span class="t-mark">(函数模板)</span> </td></tr>

<tr>
<td colspan="2"> <h5> <span class="mw-headline" id=".E9.9D.9E.E6.88.90.E5.91.98.E6.93.8D.E4.BD.9C"> 非成员操作 </span></h5>
</td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="../regex/basic_regex/swap2.html" title="cpp/regex/basic regex/swap2"> <span class="t-lines"><span>std::swap<span class="t-dsc-small">(std::basic_regex)</span></span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div></div>
</td>
<td>   特化 <span class="t-lc"><a href="../algorithm/swap.html" title="cpp/algorithm/swap">std::swap</a></span> 算法 <br> <span class="t-mark">(函数模板)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="../regex/sub_match/operator_cmp.html" title="cpp/regex/sub match/operator cmp"> <span class="t-lines"><span>operator==</span><span>operator!=</span><span>operator&lt;</span><span>operator&lt;=</span><span>operator&gt;</span><span>operator&gt;=</span><span>operator&lt;=&gt;</span></span></a></div><div><span class="t-lines"><span></span><span><span class="t-mark-rev t-until-cxx20">(C++20 中移除)</span></span><span><span class="t-mark-rev t-until-cxx20">(C++20 中移除)</span></span><span><span class="t-mark-rev t-until-cxx20">(C++20 中移除)</span></span><span><span class="t-mark-rev t-until-cxx20">(C++20 中移除)</span></span><span><span class="t-mark-rev t-until-cxx20">(C++20 中移除)</span></span><span><span class="t-mark-rev t-since-cxx20">(C++20)</span></span></span></div></div>
</td>
<td>   比较一个 <code>sub_match</code> 与另一 <code>sub_match</code> 、字符串或字符  <br> <span class="t-mark">(函数模板)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="../regex/sub_match/operator_ltlt.html" title="cpp/regex/sub match/operator ltlt"> <span class="t-lines"><span>operator&lt;&lt;</span></span></a></div></div>
</td>
<td>   输出匹配的字符子序列 <br> <span class="t-mark">(函数模板)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="../regex/match_results/operator_cmp.html" title="cpp/regex/match results/operator cmp"> <span class="t-lines"><span>operator==</span><span>operator!=</span></span></a></div><div><span class="t-lines"><span></span><span><span class="t-mark-rev t-until-cxx20">(C++20 中移除)</span></span></span></div></div>
</td>
<td>  以字典序比较两个匹配结果的值 <br> <span class="t-mark">(函数模板)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="../regex/match_results/swap2.html" title="cpp/regex/match results/swap2"> <span class="t-lines"><span>std::swap<span class="t-dsc-small">(std::match_results)</span></span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div></div>
</td>
<td>   特化 <a href="../algorithm/swap.html" title="cpp/algorithm/swap"><tt>std::swap</tt></a> 算法 <br> <span class="t-mark">(函数模板)</span> </td></tr>

<tr>
<td colspan="2"> <h5> <span class="mw-headline" id=".E8.8C.83.E5.9B.B4.E8.AE.BF.E9.97.AE"> 范围访问 </span></h5>
</td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="../iterator/begin.html" title="cpp/iterator/begin"> <span class="t-lines"><span>begin</span><span>cbegin</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span><span><span class="t-mark-rev t-since-cxx14">(C++14)</span></span></span></div></div>
</td>
<td>  返回指向容器或数组起始的迭代器 <br> <span class="t-mark">(函数模板)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="../iterator/end.html" title="cpp/iterator/end"> <span class="t-lines"><span>end</span><span>cend</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span><span><span class="t-mark-rev t-since-cxx14">(C++14)</span></span></span></div></div>
</td>
<td>  返回指向容器或数组结尾的迭代器 <br> <span class="t-mark">(函数模板)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="../iterator/rbegin.html" title="cpp/iterator/rbegin"> <span class="t-lines"><span>rbegin</span><span>crbegin</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx14">(C++14)</span></span></span></div></div>
</td>
<td>  返回指向一个容器或数组的逆向迭代器 <br> <span class="t-mark">(函数模板)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="../iterator/rend.html" title="cpp/iterator/rend"> <span class="t-lines"><span>rend</span><span>crend</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx14">(C++14)</span></span></span></div></div>
</td>
<td>  返回容器或数组的逆向尾迭代器 <br> <span class="t-mark">(函数模板)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="../iterator/size.html" title="cpp/iterator/size"> <span class="t-lines"><span>size</span><span>ssize</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx17">(C++17)</span></span><span><span class="t-mark-rev t-since-cxx20">(C++20)</span></span></span></div></div>
</td>
<td>   返回容器或数组的大小 <br> <span class="t-mark">(函数模板)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="../iterator/empty.html" title="cpp/iterator/empty"> <span class="t-lines"><span>empty</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx17">(C++17)</span></span></span></div></div>
</td>
<td>  检查容器是否为空 <br> <span class="t-mark">(函数模板)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="../iterator/data.html" title="cpp/iterator/data"> <span class="t-lines"><span>data</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx17">(C++17)</span></span></span></div></div>
</td>
<td>  获得指向底层数组的指针 <br> <span class="t-mark">(函数模板)</span> </td></tr>
</table>
<h3><span class="mw-headline" id=".E6.A6.82.E8.A6.81">概要</span></h3>
<div dir="ltr" class="mw-geshi" style="text-align: left;"><div class="cpp source-cpp"><pre class="de1"><span class="co2">#include &lt;compare&gt;</span>
<span class="co2">#include &lt;initializer_list&gt;</span>
 
<span class="kw1">namespace</span> std <span class="br0">{</span>
  <span class="co1">// regex 常量</span>
  <span class="kw1">namespace</span> regex_constants <span class="br0">{</span>
    <span class="kw1">using</span> syntax_option_type <span class="sy1">=</span> <span class="coMULTI">/*T1*/</span><span class="sy4">;</span>
    <span class="kw1">using</span> match_flag_type <span class="sy1">=</span> <span class="coMULTI">/*T2*/</span><span class="sy4">;</span>
    <span class="kw1">using</span> error_type <span class="sy1">=</span> <span class="coMULTI">/*T3*/</span><span class="sy4">;</span>
  <span class="br0">}</span>
 
  <span class="co1">// 类 regex_­error</span>
  <span class="kw1">class</span> regex_error<span class="sy4">;</span>
 
  <span class="co1">// 类模板 regex_traits</span>
  <span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> CharT<span class="sy1">&gt;</span> <span class="kw1">struct</span> regex_traits<span class="sy4">;</span>
 
  <span class="co1">// 类模板 basic_­regex</span>
  <span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> CharT, <span class="kw1">class</span> Traits <span class="sy1">=</span> regex_traits<span class="sy1">&lt;</span>CharT<span class="sy1">&gt;&gt;</span> <span class="kw1">class</span> basic_regex<span class="sy4">;</span>
 
  <span class="kw1">using</span> regex  <span class="sy1">=</span> basic_regex<span class="sy1">&lt;</span><span class="kw4">char</span><span class="sy1">&gt;</span><span class="sy4">;</span>
  <span class="kw1">using</span> wregex <span class="sy1">=</span> basic_regex<span class="sy1">&lt;</span><span class="kw4">wchar_t</span><span class="sy1">&gt;</span><span class="sy4">;</span>
 
  <span class="co1">// basic_­regex 交换</span>
  <span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> CharT, <span class="kw1">class</span> Traits<span class="sy1">&gt;</span>
    <span class="kw4">void</span> swap<span class="br0">(</span>basic_regex<span class="sy1">&lt;</span>CharT, Traits<span class="sy1">&gt;</span><span class="sy3">&amp;</span> e1, basic_regex<span class="sy1">&lt;</span>CharT, Traits<span class="sy1">&gt;</span><span class="sy3">&amp;</span> e2<span class="br0">)</span><span class="sy4">;</span>
 
  <span class="co1">// 类模板 sub_­match</span>
  <span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> BiIt<span class="sy1">&gt;</span>
    <span class="kw1">class</span> sub_match<span class="sy4">;</span>
 
  <span class="kw1">using</span> csub_match  <span class="sy1">=</span> sub_match<span class="sy1">&lt;</span><span class="kw4">const</span> <span class="kw4">char</span><span class="sy2">*</span><span class="sy1">&gt;</span><span class="sy4">;</span>
  <span class="kw1">using</span> wcsub_match <span class="sy1">=</span> sub_match<span class="sy1">&lt;</span><span class="kw4">const</span> <span class="kw4">wchar_t</span><span class="sy2">*</span><span class="sy1">&gt;</span><span class="sy4">;</span>
  <span class="kw1">using</span> ssub_match  <span class="sy1">=</span> sub_match<span class="sy1">&lt;</span>string<span class="sy4">::</span><span class="me2">const_iterator</span><span class="sy1">&gt;</span><span class="sy4">;</span>
  <span class="kw1">using</span> wssub_match <span class="sy1">=</span> sub_match<span class="sy1">&lt;</span>wstring<span class="sy4">::</span><span class="me2">const_iterator</span><span class="sy1">&gt;</span><span class="sy4">;</span>
 
  <span class="co1">// sub_­match 非成员运算符</span>
  <span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> BiIt<span class="sy1">&gt;</span>
    <span class="kw4">bool</span> operator<span class="sy1">==</span><span class="br0">(</span><span class="kw4">const</span> sub_match<span class="sy1">&lt;</span>BiIt<span class="sy1">&gt;</span><span class="sy3">&amp;</span> lhs, <span class="kw4">const</span> sub_match<span class="sy1">&lt;</span>BiIt<span class="sy1">&gt;</span><span class="sy3">&amp;</span> rhs<span class="br0">)</span><span class="sy4">;</span>
  <span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> BiIt<span class="sy1">&gt;</span>
    <span class="kw4">auto</span> operator<span class="sy1">&lt;=&gt;</span><span class="br0">(</span><span class="kw4">const</span> sub_match<span class="sy1">&lt;</span>BiIt<span class="sy1">&gt;</span><span class="sy3">&amp;</span> lhs, <span class="kw4">const</span> sub_match<span class="sy1">&lt;</span>BiIt<span class="sy1">&gt;</span><span class="sy3">&amp;</span> rhs<span class="br0">)</span><span class="sy4">;</span>
 
  <span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> BiIt, <span class="kw1">class</span> ST, <span class="kw1">class</span> SA<span class="sy1">&gt;</span>
    <span class="kw4">bool</span> operator<span class="sy1">==</span><span class="br0">(</span>
      <span class="kw4">const</span> sub_match<span class="sy1">&lt;</span>BiIt<span class="sy1">&gt;</span><span class="sy3">&amp;</span> lhs,
      <span class="kw4">const</span> basic_string<span class="sy1">&lt;</span><span class="kw1">typename</span> iterator_traits<span class="sy1">&lt;</span>BiIt<span class="sy1">&gt;</span><span class="sy4">::</span><span class="me2">value_type</span>, ST, SA<span class="sy1">&gt;</span><span class="sy3">&amp;</span> rhs<span class="br0">)</span><span class="sy4">;</span>
  <span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> BiIt, <span class="kw1">class</span> ST, <span class="kw1">class</span> SA<span class="sy1">&gt;</span>
    <span class="kw4">auto</span> operator<span class="sy1">&lt;=&gt;</span><span class="br0">(</span>
      <span class="kw4">const</span> sub_match<span class="sy1">&lt;</span>BiIt<span class="sy1">&gt;</span><span class="sy3">&amp;</span> lhs,
      <span class="kw4">const</span> basic_string<span class="sy1">&lt;</span><span class="kw1">typename</span> iterator_traits<span class="sy1">&lt;</span>BiIt<span class="sy1">&gt;</span><span class="sy4">::</span><span class="me2">value_type</span>, ST, SA<span class="sy1">&gt;</span><span class="sy3">&amp;</span> rhs<span class="br0">)</span><span class="sy4">;</span>
 
  <span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> BiIt<span class="sy1">&gt;</span>
    <span class="kw4">bool</span> operator<span class="sy1">==</span><span class="br0">(</span><span class="kw4">const</span> sub_match<span class="sy1">&lt;</span>BiIt<span class="sy1">&gt;</span><span class="sy3">&amp;</span> lhs,
                    <span class="kw4">const</span> <span class="kw1">typename</span> iterator_traits<span class="sy1">&lt;</span>BiIt<span class="sy1">&gt;</span><span class="sy4">::</span><span class="me2">value_type</span><span class="sy2">*</span> rhs<span class="br0">)</span><span class="sy4">;</span>
  <span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> BiIt<span class="sy1">&gt;</span>
    <span class="kw4">auto</span> operator<span class="sy1">&lt;=&gt;</span><span class="br0">(</span><span class="kw4">const</span> sub_match<span class="sy1">&lt;</span>BiIt<span class="sy1">&gt;</span><span class="sy3">&amp;</span> lhs,
                     <span class="kw4">const</span> <span class="kw1">typename</span> iterator_traits<span class="sy1">&lt;</span>BiIt<span class="sy1">&gt;</span><span class="sy4">::</span><span class="me2">value_type</span><span class="sy2">*</span> rhs<span class="br0">)</span><span class="sy4">;</span>
 
  <span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> BiIt<span class="sy1">&gt;</span>
    <span class="kw4">bool</span> operator<span class="sy1">==</span><span class="br0">(</span><span class="kw4">const</span> sub_match<span class="sy1">&lt;</span>BiIt<span class="sy1">&gt;</span><span class="sy3">&amp;</span> lhs,
                    <span class="kw4">const</span> <span class="kw1">typename</span> iterator_traits<span class="sy1">&lt;</span>BiIt<span class="sy1">&gt;</span><span class="sy4">::</span><span class="me2">value_type</span><span class="sy3">&amp;</span> rhs<span class="br0">)</span><span class="sy4">;</span>
  <span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> BiIt<span class="sy1">&gt;</span>
    <span class="kw4">auto</span> operator<span class="sy1">&lt;=&gt;</span><span class="br0">(</span><span class="kw4">const</span> sub_match<span class="sy1">&lt;</span>BiIt<span class="sy1">&gt;</span><span class="sy3">&amp;</span> lhs,
                     <span class="kw4">const</span> <span class="kw1">typename</span> iterator_traits<span class="sy1">&lt;</span>BiIt<span class="sy1">&gt;</span><span class="sy4">::</span><span class="me2">value_type</span><span class="sy3">&amp;</span> rhs<span class="br0">)</span><span class="sy4">;</span>
 
  <span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> CharT, <span class="kw1">class</span> ST, <span class="kw1">class</span> BiIt<span class="sy1">&gt;</span>
    basic_ostream<span class="sy1">&lt;</span>CharT, ST<span class="sy1">&gt;</span><span class="sy3">&amp;</span>
      operator<span class="sy1">&lt;&lt;</span><span class="br0">(</span>basic_ostream<span class="sy1">&lt;</span>CharT, ST<span class="sy1">&gt;</span><span class="sy3">&amp;</span> os, <span class="kw4">const</span> sub_match<span class="sy1">&lt;</span>BiIt<span class="sy1">&gt;</span><span class="sy3">&amp;</span> m<span class="br0">)</span><span class="sy4">;</span>
 
  <span class="co1">// 类模板 match_­results</span>
  <span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> BiIt,
           <span class="kw1">class</span> Allocator <span class="sy1">=</span> allocator<span class="sy1">&lt;</span>sub_match<span class="sy1">&lt;</span>BiIt<span class="sy1">&gt;&gt;&gt;</span>
    <span class="kw1">class</span> match_results<span class="sy4">;</span>
 
  <span class="kw1">using</span> cmatch  <span class="sy1">=</span> match_results<span class="sy1">&lt;</span><span class="kw4">const</span> <span class="kw4">char</span><span class="sy2">*</span><span class="sy1">&gt;</span><span class="sy4">;</span>
  <span class="kw1">using</span> wcmatch <span class="sy1">=</span> match_results<span class="sy1">&lt;</span><span class="kw4">const</span> <span class="kw4">wchar_t</span><span class="sy2">*</span><span class="sy1">&gt;</span><span class="sy4">;</span>
  <span class="kw1">using</span> smatch  <span class="sy1">=</span> match_results<span class="sy1">&lt;</span>string<span class="sy4">::</span><span class="me2">const_iterator</span><span class="sy1">&gt;</span><span class="sy4">;</span>
  <span class="kw1">using</span> wsmatch <span class="sy1">=</span> match_results<span class="sy1">&lt;</span>wstring<span class="sy4">::</span><span class="me2">const_iterator</span><span class="sy1">&gt;</span><span class="sy4">;</span>
 
  <span class="co1">// match_­results 比较</span>
  <span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> BiIt, <span class="kw1">class</span> Allocator<span class="sy1">&gt;</span>
    <span class="kw4">bool</span> operator<span class="sy1">==</span><span class="br0">(</span><span class="kw4">const</span> match_results<span class="sy1">&lt;</span>BiIt, Allocator<span class="sy1">&gt;</span><span class="sy3">&amp;</span> m1,
                    <span class="kw4">const</span> match_results<span class="sy1">&lt;</span>BiIt, Allocator<span class="sy1">&gt;</span><span class="sy3">&amp;</span> m2<span class="br0">)</span><span class="sy4">;</span>
 
  <span class="co1">// match_­results 交换</span>
  <span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> BiIt, <span class="kw1">class</span> Allocator<span class="sy1">&gt;</span>
    <span class="kw4">void</span> swap<span class="br0">(</span>match_results<span class="sy1">&lt;</span>BiIt, Allocator<span class="sy1">&gt;</span><span class="sy3">&amp;</span> m1, match_results<span class="sy1">&lt;</span>BiIt, Allocator<span class="sy1">&gt;</span><span class="sy3">&amp;</span> m2<span class="br0">)</span><span class="sy4">;</span>
 
  <span class="co1">// 函数模板 regex_­match</span>
  <span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> BiIt, <span class="kw1">class</span> Allocator, <span class="kw1">class</span> CharT, <span class="kw1">class</span> Traits<span class="sy1">&gt;</span>
    <span class="kw4">bool</span> regex_match<span class="br0">(</span>BiIt first, BiIt last,
                     match_results<span class="sy1">&lt;</span>BiIt, Allocator<span class="sy1">&gt;</span><span class="sy3">&amp;</span> m,
                     <span class="kw4">const</span> basic_regex<span class="sy1">&lt;</span>CharT, Traits<span class="sy1">&gt;</span><span class="sy3">&amp;</span> e,
                     regex_constants<span class="sy4">::</span><span class="me2">match_flag_type</span> flags <span class="sy1">=</span>
                       regex_constants<span class="sy4">::</span><span class="me2">match_default</span><span class="br0">)</span><span class="sy4">;</span>
  <span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> BiIt, <span class="kw1">class</span> CharT, <span class="kw1">class</span> Traits<span class="sy1">&gt;</span>
    <span class="kw4">bool</span> regex_match<span class="br0">(</span>BiIt first, BiIt last,
                     <span class="kw4">const</span> basic_regex<span class="sy1">&lt;</span>CharT, Traits<span class="sy1">&gt;</span><span class="sy3">&amp;</span> e,
                     regex_constants<span class="sy4">::</span><span class="me2">match_flag_type</span> flags <span class="sy1">=</span>
                       regex_constants<span class="sy4">::</span><span class="me2">match_default</span><span class="br0">)</span><span class="sy4">;</span>
  <span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> CharT, <span class="kw1">class</span> Allocator, <span class="kw1">class</span> Traits<span class="sy1">&gt;</span>
    <span class="kw4">bool</span> regex_match<span class="br0">(</span><span class="kw4">const</span> CharT<span class="sy2">*</span> str, match_results<span class="sy1">&lt;</span><span class="kw4">const</span> CharT<span class="sy2">*</span>, Allocator<span class="sy1">&gt;</span><span class="sy3">&amp;</span> m,
                     <span class="kw4">const</span> basic_regex<span class="sy1">&lt;</span>CharT, Traits<span class="sy1">&gt;</span><span class="sy3">&amp;</span> e,
                     regex_constants<span class="sy4">::</span><span class="me2">match_flag_type</span> flags <span class="sy1">=</span>
                       regex_constants<span class="sy4">::</span><span class="me2">match_default</span><span class="br0">)</span><span class="sy4">;</span>
  <span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> ST, <span class="kw1">class</span> SA, <span class="kw1">class</span> Allocator, <span class="kw1">class</span> CharT, <span class="kw1">class</span> Traits<span class="sy1">&gt;</span>
    <span class="kw4">bool</span> regex_match<span class="br0">(</span><span class="kw4">const</span> basic_string<span class="sy1">&lt;</span>CharT, ST, SA<span class="sy1">&gt;</span><span class="sy3">&amp;</span> s,
                     match_results<span class="sy1">&lt;</span><span class="kw1">typename</span> basic_string<span class="sy1">&lt;</span>CharT, ST, SA<span class="sy1">&gt;</span><span class="sy4">::</span><span class="me2">const_iterator</span>,
                                   Allocator<span class="sy1">&gt;</span><span class="sy3">&amp;</span> m,
                     <span class="kw4">const</span> basic_regex<span class="sy1">&lt;</span>CharT, Traits<span class="sy1">&gt;</span><span class="sy3">&amp;</span> e,
                     regex_constants<span class="sy4">::</span><span class="me2">match_flag_type</span> flags <span class="sy1">=</span>
                       regex_constants<span class="sy4">::</span><span class="me2">match_default</span><span class="br0">)</span><span class="sy4">;</span>
  <span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> ST, <span class="kw1">class</span> SA, <span class="kw1">class</span> Allocator, <span class="kw1">class</span> CharT, <span class="kw1">class</span> Traits<span class="sy1">&gt;</span>
    <span class="kw4">bool</span> regex_match<span class="br0">(</span><span class="kw4">const</span> basic_string<span class="sy1">&lt;</span>CharT, ST, SA<span class="sy1">&gt;</span><span class="sy3">&amp;&amp;</span>,
                     match_results<span class="sy1">&lt;</span><span class="kw1">typename</span> basic_string<span class="sy1">&lt;</span>CharT, ST, SA<span class="sy1">&gt;</span><span class="sy4">::</span><span class="me2">const_iterator</span>,
                                   Allocator<span class="sy1">&gt;</span><span class="sy3">&amp;</span>,
                     <span class="kw4">const</span> basic_regex<span class="sy1">&lt;</span>CharT, Traits<span class="sy1">&gt;</span><span class="sy3">&amp;</span>,
                     regex_constants<span class="sy4">::</span><span class="me2">match_flag_type</span> <span class="sy1">=</span>
                       regex_constants<span class="sy4">::</span><span class="me2">match_default</span><span class="br0">)</span> <span class="sy1">=</span> delete<span class="sy4">;</span>
  <span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> CharT, <span class="kw1">class</span> Traits<span class="sy1">&gt;</span>
    <span class="kw4">bool</span> regex_match<span class="br0">(</span><span class="kw4">const</span> CharT<span class="sy2">*</span> str,
                     <span class="kw4">const</span> basic_regex<span class="sy1">&lt;</span>CharT, Traits<span class="sy1">&gt;</span><span class="sy3">&amp;</span> e,
                     regex_constants<span class="sy4">::</span><span class="me2">match_flag_type</span> flags <span class="sy1">=</span>
                       regex_constants<span class="sy4">::</span><span class="me2">match_default</span><span class="br0">)</span><span class="sy4">;</span>
  <span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> ST, <span class="kw1">class</span> SA, <span class="kw1">class</span> CharT, <span class="kw1">class</span> Traits<span class="sy1">&gt;</span>
    <span class="kw4">bool</span> regex_match<span class="br0">(</span><span class="kw4">const</span> basic_string<span class="sy1">&lt;</span>CharT, ST, SA<span class="sy1">&gt;</span><span class="sy3">&amp;</span> s,
                     <span class="kw4">const</span> basic_regex<span class="sy1">&lt;</span>CharT, Traits<span class="sy1">&gt;</span><span class="sy3">&amp;</span> e,
                     regex_constants<span class="sy4">::</span><span class="me2">match_flag_type</span> flags <span class="sy1">=</span>
                       regex_constants<span class="sy4">::</span><span class="me2">match_default</span><span class="br0">)</span><span class="sy4">;</span>
 
  <span class="co1">// 函数模板 regex_­search</span>
  <span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> BiIt, <span class="kw1">class</span> Allocator, <span class="kw1">class</span> CharT, <span class="kw1">class</span> Traits<span class="sy1">&gt;</span>
    <span class="kw4">bool</span> regex_search<span class="br0">(</span>BiIt first, BiIt last,
                      match_results<span class="sy1">&lt;</span>BiIt, Allocator<span class="sy1">&gt;</span><span class="sy3">&amp;</span> m,
                      <span class="kw4">const</span> basic_regex<span class="sy1">&lt;</span>CharT, Traits<span class="sy1">&gt;</span><span class="sy3">&amp;</span> e,
                      regex_constants<span class="sy4">::</span><span class="me2">match_flag_type</span> flags <span class="sy1">=</span>
                        regex_constants<span class="sy4">::</span><span class="me2">match_default</span><span class="br0">)</span><span class="sy4">;</span>
  <span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> BiIt, <span class="kw1">class</span> CharT, <span class="kw1">class</span> Traits<span class="sy1">&gt;</span>
    <span class="kw4">bool</span> regex_search<span class="br0">(</span>BiItfirst, BiIt last,
                      <span class="kw4">const</span> basic_regex<span class="sy1">&lt;</span>CharT, Traits<span class="sy1">&gt;</span><span class="sy3">&amp;</span> e,
                      regex_constants<span class="sy4">::</span><span class="me2">match_flag_type</span> flags <span class="sy1">=</span>
                        regex_constants<span class="sy4">::</span><span class="me2">match_default</span><span class="br0">)</span><span class="sy4">;</span>
  <span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> CharT, <span class="kw1">class</span> Allocator, <span class="kw1">class</span> Traits<span class="sy1">&gt;</span>
    <span class="kw4">bool</span> regex_search<span class="br0">(</span><span class="kw4">const</span> CharT<span class="sy2">*</span> str,
                      match_results<span class="sy1">&lt;</span><span class="kw4">const</span> CharT<span class="sy2">*</span>, Allocator<span class="sy1">&gt;</span><span class="sy3">&amp;</span> m,
                      <span class="kw4">const</span> basic_regex<span class="sy1">&lt;</span>CharT, Traits<span class="sy1">&gt;</span><span class="sy3">&amp;</span> e,
                      regex_constants<span class="sy4">::</span><span class="me2">match_flag_type</span> flags <span class="sy1">=</span>
                        regex_constants<span class="sy4">::</span><span class="me2">match_default</span><span class="br0">)</span><span class="sy4">;</span>
  <span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> CharT, <span class="kw1">class</span> Traits<span class="sy1">&gt;</span>
    <span class="kw4">bool</span> regex_search<span class="br0">(</span><span class="kw4">const</span> CharT<span class="sy2">*</span> str,
                      <span class="kw4">const</span> basic_regex<span class="sy1">&lt;</span>CharT, Traits<span class="sy1">&gt;</span><span class="sy3">&amp;</span> e,
                      regex_constants<span class="sy4">::</span><span class="me2">match_flag_type</span> flags <span class="sy1">=</span>
                        regex_constants<span class="sy4">::</span><span class="me2">match_default</span><span class="br0">)</span><span class="sy4">;</span>
  <span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> ST, <span class="kw1">class</span> SA, <span class="kw1">class</span> CharT, <span class="kw1">class</span> Traits<span class="sy1">&gt;</span>
    <span class="kw4">bool</span> regex_search<span class="br0">(</span><span class="kw4">const</span> basic_string<span class="sy1">&lt;</span>CharT, ST, SA<span class="sy1">&gt;</span><span class="sy3">&amp;</span> s,
                      <span class="kw4">const</span> basic_regex<span class="sy1">&lt;</span>CharT, Traits<span class="sy1">&gt;</span><span class="sy3">&amp;</span> e,
                      regex_constants<span class="sy4">::</span><span class="me2">match_flag_type</span> flags <span class="sy1">=</span>
                        regex_constants<span class="sy4">::</span><span class="me2">match_default</span><span class="br0">)</span><span class="sy4">;</span>
  <span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> ST, <span class="kw1">class</span> SA, <span class="kw1">class</span> Allocator, <span class="kw1">class</span> CharT, <span class="kw1">class</span> Traits<span class="sy1">&gt;</span>
    <span class="kw4">bool</span> regex_search<span class="br0">(</span><span class="kw4">const</span> basic_string<span class="sy1">&lt;</span>CharT, ST, SA<span class="sy1">&gt;</span><span class="sy3">&amp;</span> s,
                      match_results<span class="sy1">&lt;</span><span class="kw1">typename</span> basic_string<span class="sy1">&lt;</span>CharT, ST, SA<span class="sy1">&gt;</span><span class="sy4">::</span><span class="me2">const_iterator</span>,
                                    Allocator<span class="sy1">&gt;</span><span class="sy3">&amp;</span> m,
                      <span class="kw4">const</span> basic_regex<span class="sy1">&lt;</span>CharT, Traits<span class="sy1">&gt;</span><span class="sy3">&amp;</span> e,
                      regex_constants<span class="sy4">::</span><span class="me2">match_flag_type</span> flags <span class="sy1">=</span>
                        regex_constants<span class="sy4">::</span><span class="me2">match_default</span><span class="br0">)</span><span class="sy4">;</span>
  <span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> ST, <span class="kw1">class</span> SA, <span class="kw1">class</span> Allocator, <span class="kw1">class</span> CharT, <span class="kw1">class</span> Traits<span class="sy1">&gt;</span>
    <span class="kw4">bool</span> regex_search<span class="br0">(</span><span class="kw4">const</span> basic_string<span class="sy1">&lt;</span>CharT, ST, SA<span class="sy1">&gt;</span><span class="sy3">&amp;&amp;</span>,
                      match_results<span class="sy1">&lt;</span><span class="kw1">typename</span> basic_string<span class="sy1">&lt;</span>CharT, ST, SA<span class="sy1">&gt;</span><span class="sy4">::</span><span class="me2">const_iterator</span>,
                                    Allocator<span class="sy1">&gt;</span><span class="sy3">&amp;</span>,
                      <span class="kw4">const</span> basic_regex<span class="sy1">&lt;</span>CharT, Traits<span class="sy1">&gt;</span><span class="sy3">&amp;</span>,
                      regex_constants<span class="sy4">::</span><span class="me2">match_flag_type</span>
                        <span class="sy1">=</span> regex_constants<span class="sy4">::</span><span class="me2">match_default</span><span class="br0">)</span> <span class="sy1">=</span> delete<span class="sy4">;</span>
 
  <span class="co1">// 函数模板 regex_­replace</span>
  <span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> OutputIt, <span class="kw1">class</span> BiIt,
            <span class="kw1">class</span> Traits, <span class="kw1">class</span> CharT, <span class="kw1">class</span> ST, <span class="kw1">class</span> SA<span class="sy1">&gt;</span>
    OutputIt
      regex_replace<span class="br0">(</span>OutputIt out,
                    BiIt first, BiIt last,
                    <span class="kw4">const</span> basic_regex<span class="sy1">&lt;</span>CharT, Traits<span class="sy1">&gt;</span><span class="sy3">&amp;</span> e,
                    <span class="kw4">const</span> basic_string<span class="sy1">&lt;</span>CharT, ST, SA<span class="sy1">&gt;</span><span class="sy3">&amp;</span> fmt,
                    regex_constants<span class="sy4">::</span><span class="me2">match_flag_type</span> flags <span class="sy1">=</span>
                      regex_constants<span class="sy4">::</span><span class="me2">match_default</span><span class="br0">)</span><span class="sy4">;</span>
  <span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> OutputIt, <span class="kw1">class</span> BiIt, <span class="kw1">class</span> Traits, <span class="kw1">class</span> CharT<span class="sy1">&gt;</span>
    OutputIt
      regex_replace<span class="br0">(</span>OutputIt out,
                    BiIt first, BiIt last,
                    <span class="kw4">const</span> basic_regex<span class="sy1">&lt;</span>CharT, Traits<span class="sy1">&gt;</span><span class="sy3">&amp;</span> e,
                    <span class="kw4">const</span> CharT<span class="sy2">*</span> fmt,
                    regex_constants<span class="sy4">::</span><span class="me2">match_flag_type</span> flags <span class="sy1">=</span>
                      regex_constants<span class="sy4">::</span><span class="me2">match_default</span><span class="br0">)</span><span class="sy4">;</span>
  <span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> Traits, <span class="kw1">class</span> CharT, <span class="kw1">class</span> ST, <span class="kw1">class</span> SA, <span class="kw1">class</span> FST, <span class="kw1">class</span> FSA<span class="sy1">&gt;</span>
    basic_string<span class="sy1">&lt;</span>CharT, ST, SA<span class="sy1">&gt;</span>
      regex_replace<span class="br0">(</span><span class="kw4">const</span> basic_string<span class="sy1">&lt;</span>CharT, ST, SA<span class="sy1">&gt;</span><span class="sy3">&amp;</span> s,
                    <span class="kw4">const</span> basic_regex<span class="sy1">&lt;</span>CharT, Traits<span class="sy1">&gt;</span><span class="sy3">&amp;</span> e,
                    <span class="kw4">const</span> basic_string<span class="sy1">&lt;</span>CharT, FST, FSA<span class="sy1">&gt;</span><span class="sy3">&amp;</span> fmt,
                    regex_constants<span class="sy4">::</span><span class="me2">match_flag_type</span> flags <span class="sy1">=</span>
                      regex_constants<span class="sy4">::</span><span class="me2">match_default</span><span class="br0">)</span><span class="sy4">;</span>
  <span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> Traits, <span class="kw1">class</span> CharT, <span class="kw1">class</span> ST, <span class="kw1">class</span> SA<span class="sy1">&gt;</span>
    basic_string<span class="sy1">&lt;</span>CharT, ST, SA<span class="sy1">&gt;</span>
      regex_replace<span class="br0">(</span><span class="kw4">const</span> basic_string<span class="sy1">&lt;</span>CharT, ST, SA<span class="sy1">&gt;</span><span class="sy3">&amp;</span> s,
                    <span class="kw4">const</span> basic_regex<span class="sy1">&lt;</span>CharT, Traits<span class="sy1">&gt;</span><span class="sy3">&amp;</span> e,
                    <span class="kw4">const</span> CharT<span class="sy2">*</span> fmt,
                    regex_constants<span class="sy4">::</span><span class="me2">match_flag_type</span> flags <span class="sy1">=</span>
                      regex_constants<span class="sy4">::</span><span class="me2">match_default</span><span class="br0">)</span><span class="sy4">;</span>
  <span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> Traits, <span class="kw1">class</span> CharT, <span class="kw1">class</span> ST, <span class="kw1">class</span> SA<span class="sy1">&gt;</span>
    basic_string<span class="sy1">&lt;</span>CharT<span class="sy1">&gt;</span>
      regex_replace<span class="br0">(</span><span class="kw4">const</span> CharT<span class="sy2">*</span> s,
                    <span class="kw4">const</span> basic_regex<span class="sy1">&lt;</span>CharT, Traits<span class="sy1">&gt;</span><span class="sy3">&amp;</span> e,
                    <span class="kw4">const</span> basic_string<span class="sy1">&lt;</span>CharT, ST, SA<span class="sy1">&gt;</span><span class="sy3">&amp;</span> fmt,
                    regex_constants<span class="sy4">::</span><span class="me2">match_flag_type</span> flags <span class="sy1">=</span>
                      regex_constants<span class="sy4">::</span><span class="me2">match_default</span><span class="br0">)</span><span class="sy4">;</span>
  <span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> Traits, <span class="kw1">class</span> CharT<span class="sy1">&gt;</span>
    basic_string<span class="sy1">&lt;</span>CharT<span class="sy1">&gt;</span>
      regex_replace<span class="br0">(</span><span class="kw4">const</span> CharT<span class="sy2">*</span> s,
                    <span class="kw4">const</span> basic_regex<span class="sy1">&lt;</span>CharT, Traits<span class="sy1">&gt;</span><span class="sy3">&amp;</span> e,
                    <span class="kw4">const</span> CharT<span class="sy2">*</span> fmt,
                    regex_constants<span class="sy4">::</span><span class="me2">match_flag_type</span> flags <span class="sy1">=</span>
                      regex_constants<span class="sy4">::</span><span class="me2">match_default</span><span class="br0">)</span><span class="sy4">;</span>
 
  <span class="co1">// 类模板 regex_­iterator</span>
  <span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> BiIt,
            <span class="kw1">class</span> CharT <span class="sy1">=</span> <span class="kw1">typename</span> iterator_traits<span class="sy1">&lt;</span>BiIt<span class="sy1">&gt;</span><span class="sy4">::</span><span class="me2">value_type</span>,
            <span class="kw1">class</span> Traits <span class="sy1">=</span> regex_traits<span class="sy1">&lt;</span>CharT<span class="sy1">&gt;&gt;</span>
    <span class="kw1">class</span> regex_iterator<span class="sy4">;</span>
 
  <span class="kw1">using</span> cregex_iterator  <span class="sy1">=</span> regex_iterator<span class="sy1">&lt;</span><span class="kw4">const</span> <span class="kw4">char</span><span class="sy2">*</span><span class="sy1">&gt;</span><span class="sy4">;</span>
  <span class="kw1">using</span> wcregex_iterator <span class="sy1">=</span> regex_iterator<span class="sy1">&lt;</span><span class="kw4">const</span> <span class="kw4">wchar_t</span><span class="sy2">*</span><span class="sy1">&gt;</span><span class="sy4">;</span>
  <span class="kw1">using</span> sregex_iterator  <span class="sy1">=</span> regex_iterator<span class="sy1">&lt;</span>string<span class="sy4">::</span><span class="me2">const_iterator</span><span class="sy1">&gt;</span><span class="sy4">;</span>
  <span class="kw1">using</span> wsregex_iterator <span class="sy1">=</span> regex_iterator<span class="sy1">&lt;</span>wstring<span class="sy4">::</span><span class="me2">const_iterator</span><span class="sy1">&gt;</span><span class="sy4">;</span>
 
  <span class="co1">// 类模板 regex_­token_­iterator</span>
  <span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> BiIt,
            <span class="kw1">class</span> CharT <span class="sy1">=</span> <span class="kw1">typename</span> iterator_traits<span class="sy1">&lt;</span>BiIt<span class="sy1">&gt;</span><span class="sy4">::</span><span class="me2">value_type</span>,
            <span class="kw1">class</span> Traits <span class="sy1">=</span> regex_traits<span class="sy1">&lt;</span>CharT<span class="sy1">&gt;&gt;</span>
    <span class="kw1">class</span> regex_token_iterator<span class="sy4">;</span>
 
  <span class="kw1">using</span> cregex_token_iterator  <span class="sy1">=</span> regex_token_iterator<span class="sy1">&lt;</span><span class="kw4">const</span> <span class="kw4">char</span><span class="sy2">*</span><span class="sy1">&gt;</span><span class="sy4">;</span>
  <span class="kw1">using</span> wcregex_token_iterator <span class="sy1">=</span> regex_token_iterator<span class="sy1">&lt;</span><span class="kw4">const</span> <span class="kw4">wchar_t</span><span class="sy2">*</span><span class="sy1">&gt;</span><span class="sy4">;</span>
  <span class="kw1">using</span> sregex_token_iterator  <span class="sy1">=</span> regex_token_iterator<span class="sy1">&lt;</span>string<span class="sy4">::</span><span class="me2">const_iterator</span><span class="sy1">&gt;</span><span class="sy4">;</span>
  <span class="kw1">using</span> wsregex_token_iterator <span class="sy1">=</span> regex_token_iterator<span class="sy1">&lt;</span>wstring<span class="sy4">::</span><span class="me2">const_iterator</span><span class="sy1">&gt;</span><span class="sy4">;</span>
 
  <span class="kw1">namespace</span> pmr <span class="br0">{</span>
    <span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> BiIt<span class="sy1">&gt;</span>
      <span class="kw1">using</span> match_results <span class="sy1">=</span>
        <a href="../regex/match_results.html"><span class="kw2007">std::<span class="me2">match_results</span></span></a><span class="sy1">&lt;</span>BiIt, polymorphic_allocator<span class="sy1">&lt;</span>sub_match<span class="sy1">&lt;</span>BiIt<span class="sy1">&gt;&gt;&gt;</span><span class="sy4">;</span>
 
    <span class="kw1">using</span> cmatch  <span class="sy1">=</span> match_results<span class="sy1">&lt;</span><span class="kw4">const</span> <span class="kw4">char</span><span class="sy2">*</span><span class="sy1">&gt;</span><span class="sy4">;</span>
    <span class="kw1">using</span> wcmatch <span class="sy1">=</span> match_results<span class="sy1">&lt;</span><span class="kw4">const</span> <span class="kw4">wchar_t</span><span class="sy2">*</span><span class="sy1">&gt;</span><span class="sy4">;</span>
    <span class="kw1">using</span> smatch  <span class="sy1">=</span> match_results<span class="sy1">&lt;</span>string<span class="sy4">::</span><span class="me2">const_iterator</span><span class="sy1">&gt;</span><span class="sy4">;</span>
    <span class="kw1">using</span> wsmatch <span class="sy1">=</span> match_results<span class="sy1">&lt;</span>wstring<span class="sy4">::</span><span class="me2">const_iterator</span><span class="sy1">&gt;</span><span class="sy4">;</span>
  <span class="br0">}</span>
<span class="br0">}</span></pre></div></div>
<h4><span class="mw-headline" id=".E4.BD.8D.E6.8E.A9.E7.A0.81.E7.B1.BB.E5.9E.8B_std::regex_constants::syntax_option_type">位掩码类型 <span class="t-lc"><a href="../regex/syntax_option_type.html" title="cpp/regex/syntax option type">std::regex_constants::syntax_option_type</a></span></span></h4>
<div dir="ltr" class="mw-geshi" style="text-align: left;"><div class="cpp source-cpp"><pre class="de1"><span class="kw1">namespace</span> std<span class="sy4">::</span><span class="me2">regex_constants</span> <span class="br0">{</span>
  <span class="kw1">using</span> syntax_option_type <span class="sy1">=</span> <span class="coMULTI">/*T1*/</span><span class="sy4">;</span>
  <span class="kw1">inline</span> <span class="kw4">constexpr</span> syntax_option_type icase <span class="sy1">=</span> <span class="coMULTI">/* 未指明 */</span><span class="sy4">;</span>
  <span class="kw1">inline</span> <span class="kw4">constexpr</span> syntax_option_type nosubs <span class="sy1">=</span> <span class="coMULTI">/* 未指明 */</span><span class="sy4">;</span>
  <span class="kw1">inline</span> <span class="kw4">constexpr</span> syntax_option_type optimize <span class="sy1">=</span> <span class="coMULTI">/* 未指明 */</span><span class="sy4">;</span>
  <span class="kw1">inline</span> <span class="kw4">constexpr</span> syntax_option_type collate <span class="sy1">=</span> <span class="coMULTI">/* 未指明 */</span><span class="sy4">;</span>
  <span class="kw1">inline</span> <span class="kw4">constexpr</span> syntax_option_type ECMAScript <span class="sy1">=</span> <span class="coMULTI">/* 未指明 */</span><span class="sy4">;</span>
  <span class="kw1">inline</span> <span class="kw4">constexpr</span> syntax_option_type basic <span class="sy1">=</span> <span class="coMULTI">/* 未指明 */</span><span class="sy4">;</span>
  <span class="kw1">inline</span> <span class="kw4">constexpr</span> syntax_option_type extended <span class="sy1">=</span> <span class="coMULTI">/* 未指明 */</span><span class="sy4">;</span>
  <span class="kw1">inline</span> <span class="kw4">constexpr</span> syntax_option_type awk <span class="sy1">=</span> <span class="coMULTI">/* 未指明 */</span><span class="sy4">;</span>
  <span class="kw1">inline</span> <span class="kw4">constexpr</span> syntax_option_type grep <span class="sy1">=</span> <span class="coMULTI">/* 未指明 */</span><span class="sy4">;</span>
  <span class="kw1">inline</span> <span class="kw4">constexpr</span> syntax_option_type egrep <span class="sy1">=</span> <span class="coMULTI">/* 未指明 */</span><span class="sy4">;</span>
  <span class="kw1">inline</span> <span class="kw4">constexpr</span> syntax_option_type multiline <span class="sy1">=</span> <span class="coMULTI">/* 未指明 */</span><span class="sy4">;</span>
<span class="br0">}</span></pre></div></div>
<h4><span class="mw-headline" id=".E4.BD.8D.E6.8E.A9.E7.A0.81.E7.B1.BB.E5.9E.8B_std::regex_constants::match_flag_type">位掩码类型 <span class="t-lc"><a href="../regex/match_flag_type.html" title="cpp/regex/match flag type">std::regex_constants::match_flag_type</a></span></span></h4>
<div dir="ltr" class="mw-geshi" style="text-align: left;"><div class="cpp source-cpp"><pre class="de1"><span class="kw1">namespace</span> std<span class="sy4">::</span><span class="me2">regex_constants</span> <span class="br0">{</span>
  <span class="kw1">using</span> match_flag_type <span class="sy1">=</span> <span class="coMULTI">/*T2*/</span><span class="sy4">;</span>
  <span class="kw1">inline</span> <span class="kw4">constexpr</span> match_flag_type match_­<span class="kw1">default</span> <span class="sy1">=</span> <span class="br0">{</span><span class="br0">}</span><span class="sy4">;</span>
  <span class="kw1">inline</span> <span class="kw4">constexpr</span> match_flag_type match_­not_­bol <span class="sy1">=</span> <span class="coMULTI">/* 未指明 */</span><span class="sy4">;</span>
  <span class="kw1">inline</span> <span class="kw4">constexpr</span> match_flag_type match_­not_­eol <span class="sy1">=</span> <span class="coMULTI">/* 未指明 */</span><span class="sy4">;</span>
  <span class="kw1">inline</span> <span class="kw4">constexpr</span> match_flag_type match_­not_­bow <span class="sy1">=</span> <span class="coMULTI">/* 未指明 */</span><span class="sy4">;</span>
  <span class="kw1">inline</span> <span class="kw4">constexpr</span> match_flag_type match_­not_­eow <span class="sy1">=</span> <span class="coMULTI">/* 未指明 */</span><span class="sy4">;</span>
  <span class="kw1">inline</span> <span class="kw4">constexpr</span> match_flag_type match_­any <span class="sy1">=</span> <span class="coMULTI">/* 未指明 */</span><span class="sy4">;</span>
  <span class="kw1">inline</span> <span class="kw4">constexpr</span> match_flag_type match_­not_­null <span class="sy1">=</span> <span class="coMULTI">/* 未指明 */</span><span class="sy4">;</span>
  <span class="kw1">inline</span> <span class="kw4">constexpr</span> match_flag_type match_­continuous <span class="sy1">=</span> <span class="coMULTI">/* 未指明 */</span><span class="sy4">;</span>
  <span class="kw1">inline</span> <span class="kw4">constexpr</span> match_flag_type match_­prev_­avail <span class="sy1">=</span> <span class="coMULTI">/* 未指明 */</span><span class="sy4">;</span>
  <span class="kw1">inline</span> <span class="kw4">constexpr</span> match_flag_type format_­<span class="kw1">default</span> <span class="sy1">=</span> <span class="br0">{</span><span class="br0">}</span><span class="sy4">;</span>
  <span class="kw1">inline</span> <span class="kw4">constexpr</span> match_flag_type format_­sed <span class="sy1">=</span> <span class="coMULTI">/* 未指明 */</span><span class="sy4">;</span>
  <span class="kw1">inline</span> <span class="kw4">constexpr</span> match_flag_type format_­no_­copy <span class="sy1">=</span> <span class="coMULTI">/* 未指明 */</span><span class="sy4">;</span>
  <span class="kw1">inline</span> <span class="kw4">constexpr</span> match_flag_type format_­first_­only <span class="sy1">=</span> <span class="coMULTI">/* 未指明 */</span><span class="sy4">;</span>
<span class="br0">}</span></pre></div></div>
<h4><span class="mw-headline" id=".E8.A2.AB.E6.9E.9A.E4.B8.BE.E7.B1.BB.E5.9E.8B_std::regex_constants::error_type">被枚举类型 <span class="t-lc"><a href="../regex/error_type.html" title="cpp/regex/error type">std::regex_constants::error_type</a></span></span></h4>
<div dir="ltr" class="mw-geshi" style="text-align: left;"><div class="cpp source-cpp"><pre class="de1"><span class="kw1">namespace</span> std<span class="sy4">::</span><span class="me2">regex_constants</span> <span class="br0">{</span>
  <span class="kw1">using</span> error_type <span class="sy1">=</span> <span class="coMULTI">/*T3*/</span><span class="sy4">;</span>
  <span class="kw1">inline</span> <span class="kw4">constexpr</span> error_type error_collate <span class="sy1">=</span> <span class="coMULTI">/* 未指明 */</span><span class="sy4">;</span>
  <span class="kw1">inline</span> <span class="kw4">constexpr</span> error_type error_ctype <span class="sy1">=</span> <span class="coMULTI">/* 未指明 */</span><span class="sy4">;</span>
  <span class="kw1">inline</span> <span class="kw4">constexpr</span> error_type error_escape <span class="sy1">=</span> <span class="coMULTI">/* 未指明 */</span><span class="sy4">;</span>
  <span class="kw1">inline</span> <span class="kw4">constexpr</span> error_type error_backref <span class="sy1">=</span> <span class="coMULTI">/* 未指明 */</span><span class="sy4">;</span>
  <span class="kw1">inline</span> <span class="kw4">constexpr</span> error_type error_brack <span class="sy1">=</span> <span class="coMULTI">/* 未指明 */</span><span class="sy4">;</span>
  <span class="kw1">inline</span> <span class="kw4">constexpr</span> error_type error_paren <span class="sy1">=</span> <span class="coMULTI">/* 未指明 */</span><span class="sy4">;</span>
  <span class="kw1">inline</span> <span class="kw4">constexpr</span> error_type error_brace <span class="sy1">=</span> <span class="coMULTI">/* 未指明 */</span><span class="sy4">;</span>
  <span class="kw1">inline</span> <span class="kw4">constexpr</span> error_type error_badbrace <span class="sy1">=</span> <span class="coMULTI">/* 未指明 */</span><span class="sy4">;</span>
  <span class="kw1">inline</span> <span class="kw4">constexpr</span> error_type error_range <span class="sy1">=</span> <span class="coMULTI">/* 未指明 */</span><span class="sy4">;</span>
  <span class="kw1">inline</span> <span class="kw4">constexpr</span> error_type error_space <span class="sy1">=</span> <span class="coMULTI">/* 未指明 */</span><span class="sy4">;</span>
  <span class="kw1">inline</span> <span class="kw4">constexpr</span> error_type error_badrepeat <span class="sy1">=</span> <span class="coMULTI">/* 未指明 */</span><span class="sy4">;</span>
  <span class="kw1">inline</span> <span class="kw4">constexpr</span> error_type error_complexity <span class="sy1">=</span> <span class="coMULTI">/* 未指明 */</span><span class="sy4">;</span>
  <span class="kw1">inline</span> <span class="kw4">constexpr</span> error_type error_stack <span class="sy1">=</span> <span class="coMULTI">/* 未指明 */</span><span class="sy4">;</span>
<span class="br0">}</span></pre></div></div>
<h4><span class="mw-headline" id=".E7.B1.BB_std::regex_error">类 <span class="t-lc"><a href="../regex/regex_error.html" title="cpp/regex/regex error">std::regex_error</a></span></span></h4>
<div dir="ltr" class="mw-geshi" style="text-align: left;"><div class="cpp source-cpp"><pre class="de1"><span class="kw1">namespace</span> std <span class="br0">{</span>
  <span class="kw1">class</span> regex_error <span class="sy4">:</span> <span class="kw1">public</span> runtime_error <span class="br0">{</span>
  <span class="kw1">public</span><span class="sy4">:</span>
    <span class="kw1">explicit</span> regex_error<span class="br0">(</span>regex_constants<span class="sy4">::</span><span class="me2">error_type</span> ecode<span class="br0">)</span><span class="sy4">;</span>
    regex_constants<span class="sy4">::</span><span class="me2">error_type</span> code<span class="br0">(</span><span class="br0">)</span> <span class="kw4">const</span><span class="sy4">;</span>
  <span class="br0">}</span><span class="sy4">;</span>
<span class="br0">}</span></pre></div></div>
<h4><span class="mw-headline" id=".E7.B1.BB.E6.A8.A1.E6.9D.BF_std::regex_traits">类模板 <span class="t-lc"><a href="../regex/regex_traits.html" title="cpp/regex/regex traits">std::regex_traits</a></span></span></h4>
<div dir="ltr" class="mw-geshi" style="text-align: left;"><div class="cpp source-cpp"><pre class="de1"><span class="kw1">namespace</span> std <span class="br0">{</span>
  <span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> CharT<span class="sy1">&gt;</span>
    <span class="kw1">struct</span> regex_traits <span class="br0">{</span>
      <span class="kw1">using</span> char_type       <span class="sy1">=</span> CharT<span class="sy4">;</span>
      <span class="kw1">using</span> string_type     <span class="sy1">=</span> basic_string<span class="sy1">&lt;</span>char_type<span class="sy1">&gt;</span><span class="sy4">;</span>
      <span class="kw1">using</span> locale_type     <span class="sy1">=</span> locale<span class="sy4">;</span>
      <span class="kw1">using</span> char_class_type <span class="sy1">=</span> <span class="coMULTI">/* 位掩码类型 */</span><span class="sy4">;</span>
 
      regex_traits<span class="br0">(</span><span class="br0">)</span><span class="sy4">;</span>
      <span class="kw4">static</span> size_t length<span class="br0">(</span><span class="kw4">const</span> char_type<span class="sy2">*</span> p<span class="br0">)</span><span class="sy4">;</span>
      CharT translate<span class="br0">(</span>CharT c<span class="br0">)</span> <span class="kw4">const</span><span class="sy4">;</span>
      CharT translate_nocase<span class="br0">(</span>CharT c<span class="br0">)</span> <span class="kw4">const</span><span class="sy4">;</span>
      <span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> ForwardIt<span class="sy1">&gt;</span>
        string_type transform<span class="br0">(</span>ForwardIt first, ForwardIt last<span class="br0">)</span> <span class="kw4">const</span><span class="sy4">;</span>
      <span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> ForwardIt<span class="sy1">&gt;</span>
        string_type transform_primary<span class="br0">(</span>ForwardIt first, ForwardIt last<span class="br0">)</span> <span class="kw4">const</span><span class="sy4">;</span>
      <span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> ForwardIt<span class="sy1">&gt;</span>
        string_type lookup_collatename<span class="br0">(</span>ForwardIt first, ForwardIt last<span class="br0">)</span> <span class="kw4">const</span><span class="sy4">;</span>
      <span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> ForwardIt<span class="sy1">&gt;</span>
        char_class_type lookup_classname<span class="br0">(</span>ForwardIt first, ForwardIt last,
                                         <span class="kw4">bool</span> icase <span class="sy1">=</span> <span class="kw2">false</span><span class="br0">)</span> <span class="kw4">const</span><span class="sy4">;</span>
      <span class="kw4">bool</span> isctype<span class="br0">(</span>CharT c, char_class_type f<span class="br0">)</span> <span class="kw4">const</span><span class="sy4">;</span>
      <span class="kw4">int</span> value<span class="br0">(</span>CharT ch, <span class="kw4">int</span> radix<span class="br0">)</span> <span class="kw4">const</span><span class="sy4">;</span>
      locale_type imbue<span class="br0">(</span>locale_type l<span class="br0">)</span><span class="sy4">;</span>
      locale_type getloc<span class="br0">(</span><span class="br0">)</span> <span class="kw4">const</span><span class="sy4">;</span>
    <span class="br0">}</span><span class="sy4">;</span>
<span class="br0">}</span></pre></div></div>
<h4><span class="mw-headline" id=".E7.B1.BB.E6.A8.A1.E6.9D.BF_std::basic_regex">类模板 <span class="t-lc"><a href="../regex/basic_regex.html" title="cpp/regex/basic regex">std::basic_regex</a></span></span></h4>
<div dir="ltr" class="mw-geshi" style="text-align: left;"><div class="cpp source-cpp"><pre class="de1"><span class="kw1">namespace</span> std <span class="br0">{</span>
  <span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> CharT, <span class="kw1">class</span> Traits <span class="sy1">=</span> regex_traits<span class="sy1">&lt;</span>CharT<span class="sy1">&gt;&gt;</span>
    <span class="kw1">class</span> basic_regex <span class="br0">{</span>
    <span class="kw1">public</span><span class="sy4">:</span>
      <span class="co1">// 类型</span>
      <span class="kw1">using</span> value_type  <span class="sy1">=</span>          CharT<span class="sy4">;</span>
      <span class="kw1">using</span> Traits_type <span class="sy1">=</span>          Traits<span class="sy4">;</span>
      <span class="kw1">using</span> string_type <span class="sy1">=</span> <span class="kw1">typename</span> Traits<span class="sy4">::</span><span class="me2">string_type</span><span class="sy4">;</span>
      <span class="kw1">using</span> flag_type   <span class="sy1">=</span>          regex_constants<span class="sy4">::</span><span class="me2">syntax_option_type</span><span class="sy4">;</span>
      <span class="kw1">using</span> locale_type <span class="sy1">=</span> <span class="kw1">typename</span> Traits<span class="sy4">::</span><span class="me2">locale_type</span><span class="sy4">;</span>
 
      <span class="co1">// 常量</span>
      <span class="kw4">static</span> <span class="kw4">constexpr</span> flag_type icase <span class="sy1">=</span> regex_constants<span class="sy4">::</span><span class="me2">icase</span><span class="sy4">;</span>
      <span class="kw4">static</span> <span class="kw4">constexpr</span> flag_type nosubs <span class="sy1">=</span> regex_constants<span class="sy4">::</span><span class="me2">nosubs</span><span class="sy4">;</span>
      <span class="kw4">static</span> <span class="kw4">constexpr</span> flag_type optimize <span class="sy1">=</span> regex_constants<span class="sy4">::</span><span class="me2">optimize</span><span class="sy4">;</span>
      <span class="kw4">static</span> <span class="kw4">constexpr</span> flag_type collate <span class="sy1">=</span> regex_constants<span class="sy4">::</span><span class="me2">collate</span><span class="sy4">;</span>
      <span class="kw4">static</span> <span class="kw4">constexpr</span> flag_type ECMAScript <span class="sy1">=</span> regex_constants<span class="sy4">::</span><span class="me2">ECMAScript</span><span class="sy4">;</span>
      <span class="kw4">static</span> <span class="kw4">constexpr</span> flag_type basic <span class="sy1">=</span> regex_constants<span class="sy4">::</span><span class="me2">basic</span><span class="sy4">;</span>
      <span class="kw4">static</span> <span class="kw4">constexpr</span> flag_type extended <span class="sy1">=</span> regex_constants<span class="sy4">::</span><span class="me2">extended</span><span class="sy4">;</span>
      <span class="kw4">static</span> <span class="kw4">constexpr</span> flag_type awk <span class="sy1">=</span> regex_constants<span class="sy4">::</span><span class="me2">awk</span><span class="sy4">;</span>
      <span class="kw4">static</span> <span class="kw4">constexpr</span> flag_type grep <span class="sy1">=</span> regex_constants<span class="sy4">::</span><span class="me2">grep</span><span class="sy4">;</span>
      <span class="kw4">static</span> <span class="kw4">constexpr</span> flag_type egrep <span class="sy1">=</span> regex_constants<span class="sy4">::</span><span class="me2">egrep</span><span class="sy4">;</span>
      <span class="kw4">static</span> <span class="kw4">constexpr</span> flag_type multiline <span class="sy1">=</span> regex_constants<span class="sy4">::</span><span class="me2">multiline</span><span class="sy4">;</span>
 
      <span class="co1">// 构造/复制/销毁</span>
      basic_regex<span class="br0">(</span><span class="br0">)</span><span class="sy4">;</span>
      <span class="kw1">explicit</span> basic_regex<span class="br0">(</span><span class="kw4">const</span> CharT<span class="sy2">*</span> p, flag_type f <span class="sy1">=</span> regex_constants<span class="sy4">::</span><span class="me2">ECMAScript</span><span class="br0">)</span><span class="sy4">;</span>
      basic_regex<span class="br0">(</span><span class="kw4">const</span> CharT<span class="sy2">*</span> p, size_t len, flag_type f <span class="sy1">=</span> regex_constants<span class="sy4">::</span><span class="me2">ECMAScript</span><span class="br0">)</span><span class="sy4">;</span>
      basic_regex<span class="br0">(</span><span class="kw4">const</span> basic_regex<span class="sy3">&amp;</span><span class="br0">)</span><span class="sy4">;</span>
      basic_regex<span class="br0">(</span>basic_regex<span class="sy3">&amp;&amp;</span><span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
      <span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> ST, <span class="kw1">class</span> SA<span class="sy1">&gt;</span>
        <span class="kw1">explicit</span> basic_regex<span class="br0">(</span><span class="kw4">const</span> basic_string<span class="sy1">&lt;</span>CharT, ST, SA<span class="sy1">&gt;</span><span class="sy3">&amp;</span> s,
                             flag_type f <span class="sy1">=</span> regex_constants<span class="sy4">::</span><span class="me2">ECMAScript</span><span class="br0">)</span><span class="sy4">;</span>
      <span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> ForwardIt<span class="sy1">&gt;</span>
        basic_regex<span class="br0">(</span>ForwardIt first, ForwardIt last,
                    flag_type f <span class="sy1">=</span> regex_constants<span class="sy4">::</span><span class="me2">ECMAScript</span><span class="br0">)</span><span class="sy4">;</span>
      basic_regex<span class="br0">(</span>initializer_list<span class="sy1">&lt;</span>CharT<span class="sy1">&gt;</span> il, flag_type f <span class="sy1">=</span> regex_constants<span class="sy4">::</span><span class="me2">ECMAScript</span><span class="br0">)</span><span class="sy4">;</span>
 
      ~basic_regex<span class="br0">(</span><span class="br0">)</span><span class="sy4">;</span>
 
      <span class="co1">// 赋值</span>
      basic_regex<span class="sy3">&amp;</span> operator<span class="sy1">=</span><span class="br0">(</span><span class="kw4">const</span> basic_regex<span class="sy3">&amp;</span> e<span class="br0">)</span><span class="sy4">;</span>
      basic_regex<span class="sy3">&amp;</span> operator<span class="sy1">=</span><span class="br0">(</span>basic_regex<span class="sy3">&amp;&amp;</span> e<span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
      basic_regex<span class="sy3">&amp;</span> operator<span class="sy1">=</span><span class="br0">(</span><span class="kw4">const</span> CharT<span class="sy2">*</span> p<span class="br0">)</span><span class="sy4">;</span>
      basic_regex<span class="sy3">&amp;</span> operator<span class="sy1">=</span><span class="br0">(</span>initializer_list<span class="sy1">&lt;</span>CharT<span class="sy1">&gt;</span> il<span class="br0">)</span><span class="sy4">;</span>
      <span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> ST, <span class="kw1">class</span> SA<span class="sy1">&gt;</span>
        basic_regex<span class="sy3">&amp;</span> operator<span class="sy1">=</span><span class="br0">(</span><span class="kw4">const</span> basic_string<span class="sy1">&lt;</span>CharT, ST, SA<span class="sy1">&gt;</span><span class="sy3">&amp;</span> s<span class="br0">)</span><span class="sy4">;</span>
 
      basic_regex<span class="sy3">&amp;</span> assign<span class="br0">(</span><span class="kw4">const</span> basic_regex<span class="sy3">&amp;</span> e<span class="br0">)</span><span class="sy4">;</span>
      basic_regex<span class="sy3">&amp;</span> assign<span class="br0">(</span>basic_regex<span class="sy3">&amp;&amp;</span> e<span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
      basic_regex<span class="sy3">&amp;</span> assign<span class="br0">(</span><span class="kw4">const</span> CharT<span class="sy2">*</span> p, flag_type f <span class="sy1">=</span> regex_constants<span class="sy4">::</span><span class="me2">ECMAScript</span><span class="br0">)</span><span class="sy4">;</span>
      basic_regex<span class="sy3">&amp;</span> assign<span class="br0">(</span><span class="kw4">const</span> CharT<span class="sy2">*</span> p, size_t len,
                          flag_type f <span class="sy1">=</span> regex_constants<span class="sy4">::</span><span class="me2">ECMAScript</span><span class="br0">)</span><span class="sy4">;</span>
      <span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> ST, <span class="kw1">class</span> SA<span class="sy1">&gt;</span>
        basic_regex<span class="sy3">&amp;</span> assign<span class="br0">(</span><span class="kw4">const</span> basic_string<span class="sy1">&lt;</span>CharT, ST, SA<span class="sy1">&gt;</span><span class="sy3">&amp;</span> s,
                            flag_type f <span class="sy1">=</span> regex_constants<span class="sy4">::</span><span class="me2">ECMAScript</span><span class="br0">)</span><span class="sy4">;</span>
      <span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> InputIt<span class="sy1">&gt;</span>
        basic_regex<span class="sy3">&amp;</span> assign<span class="br0">(</span>InputIt first, InputIt last,
                            flag_type f <span class="sy1">=</span> regex_constants<span class="sy4">::</span><span class="me2">ECMAScript</span><span class="br0">)</span><span class="sy4">;</span>
      basic_regex<span class="sy3">&amp;</span> assign<span class="br0">(</span>initializer_list<span class="sy1">&lt;</span>CharT<span class="sy1">&gt;</span>,
                          flag_type f <span class="sy1">=</span> regex_constants<span class="sy4">::</span><span class="me2">ECMAScript</span><span class="br0">)</span><span class="sy4">;</span>
 
      <span class="co1">// const 操作</span>
      <span class="kw4">unsigned</span> mark_count<span class="br0">(</span><span class="br0">)</span> <span class="kw4">const</span><span class="sy4">;</span>
      flag_type flags<span class="br0">(</span><span class="br0">)</span> <span class="kw4">const</span><span class="sy4">;</span>
 
      <span class="co1">// 本地环境</span>
      locale_type imbue<span class="br0">(</span>locale_type loc<span class="br0">)</span><span class="sy4">;</span>
      locale_type getloc<span class="br0">(</span><span class="br0">)</span> <span class="kw4">const</span><span class="sy4">;</span>
 
      <span class="co1">// 交换</span>
      <span class="kw4">void</span> swap<span class="br0">(</span>basic_regex<span class="sy3">&amp;</span><span class="br0">)</span><span class="sy4">;</span>
    <span class="br0">}</span><span class="sy4">;</span>
 
  <span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> ForwardIt<span class="sy1">&gt;</span>
    basic_regex<span class="br0">(</span>ForwardIt, ForwardIt,
                regex_constants<span class="sy4">::</span><span class="me2">syntax_option_type</span> <span class="sy1">=</span> regex_constants<span class="sy4">::</span><span class="me2">ECMAScript</span><span class="br0">)</span>
      <span class="sy2">-</span><span class="sy1">&gt;</span> basic_regex<span class="sy1">&lt;</span><span class="kw1">typename</span> iterator_traits<span class="sy1">&lt;</span>ForwardIt<span class="sy1">&gt;</span><span class="sy4">::</span><span class="me2">value_type</span><span class="sy1">&gt;</span><span class="sy4">;</span>
<span class="br0">}</span></pre></div></div>
<h4><span class="mw-headline" id=".E7.B1.BB.E6.A8.A1.E6.9D.BF_std::sub_match">类模板 <span class="t-lc"><a href="../regex/sub_match.html" title="cpp/regex/sub match">std::sub_match</a></span></span></h4>
<div dir="ltr" class="mw-geshi" style="text-align: left;"><div class="cpp source-cpp"><pre class="de1"><span class="kw1">namespace</span> std <span class="br0">{</span>
  <span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> BiIt<span class="sy1">&gt;</span>
    <span class="kw1">class</span> sub_match <span class="sy4">:</span> <span class="kw1">public</span> pair<span class="sy1">&lt;</span>BiIt, BiIt<span class="sy1">&gt;</span> <span class="br0">{</span>
    <span class="kw1">public</span><span class="sy4">:</span>
      <span class="kw1">using</span> value_type      <span class="sy1">=</span> <span class="kw1">typename</span> iterator_traits<span class="sy1">&lt;</span>BiIt<span class="sy1">&gt;</span><span class="sy4">::</span><span class="me2">value_type</span><span class="sy4">;</span>
      <span class="kw1">using</span> difference_type <span class="sy1">=</span> <span class="kw1">typename</span> iterator_traits<span class="sy1">&lt;</span>BiIt<span class="sy1">&gt;</span><span class="sy4">::</span><span class="me2">difference_type</span><span class="sy4">;</span>
      <span class="kw1">using</span> iterator        <span class="sy1">=</span> BiIt<span class="sy4">;</span>
      <span class="kw1">using</span> string_type     <span class="sy1">=</span> basic_string<span class="sy1">&lt;</span>value_type<span class="sy1">&gt;</span><span class="sy4">;</span>
 
      <span class="kw4">bool</span> matched<span class="sy4">;</span>
 
      <span class="kw4">constexpr</span> sub_match<span class="br0">(</span><span class="br0">)</span><span class="sy4">;</span>
 
      difference_type length<span class="br0">(</span><span class="br0">)</span> <span class="kw4">const</span><span class="sy4">;</span>
      operator string_type<span class="br0">(</span><span class="br0">)</span> <span class="kw4">const</span><span class="sy4">;</span>
      string_type str<span class="br0">(</span><span class="br0">)</span> <span class="kw4">const</span><span class="sy4">;</span>
 
      <span class="kw4">int</span> compare<span class="br0">(</span><span class="kw4">const</span> sub_match<span class="sy3">&amp;</span> s<span class="br0">)</span> <span class="kw4">const</span><span class="sy4">;</span>
      <span class="kw4">int</span> compare<span class="br0">(</span><span class="kw4">const</span> string_type<span class="sy3">&amp;</span> s<span class="br0">)</span> <span class="kw4">const</span><span class="sy4">;</span>
      <span class="kw4">int</span> compare<span class="br0">(</span><span class="kw4">const</span> value_type<span class="sy2">*</span> s<span class="br0">)</span> <span class="kw4">const</span><span class="sy4">;</span>
    <span class="br0">}</span><span class="sy4">;</span>
<span class="br0">}</span></pre></div></div>
<h4><span class="mw-headline" id=".E7.B1.BB.E6.A8.A1.E6.9D.BF_std::match_results">类模板 <span class="t-lc"><a href="../regex/match_results.html" title="cpp/regex/match results">std::match_results</a></span></span></h4>
<div dir="ltr" class="mw-geshi" style="text-align: left;"><div class="cpp source-cpp"><pre class="de1"><span class="kw1">namespace</span> std <span class="br0">{</span>
  <span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> BiIt,
           <span class="kw1">class</span> Allocator <span class="sy1">=</span> allocator<span class="sy1">&lt;</span>sub_match<span class="sy1">&lt;</span>BiIt<span class="sy1">&gt;&gt;&gt;</span>
    <span class="kw1">class</span> match_results <span class="br0">{</span>
    <span class="kw1">public</span><span class="sy4">:</span>
      <span class="kw1">using</span> value_type      <span class="sy1">=</span> sub_match<span class="sy1">&lt;</span>BiIt<span class="sy1">&gt;</span><span class="sy4">;</span>
      <span class="kw1">using</span> const_reference <span class="sy1">=</span> <span class="kw4">const</span> value_type<span class="sy3">&amp;</span><span class="sy4">;</span>
      <span class="kw1">using</span> reference       <span class="sy1">=</span> value_type<span class="sy3">&amp;</span><span class="sy4">;</span>
      <span class="kw1">using</span> const_iterator  <span class="sy1">=</span> <span class="coMULTI">/* 由实现定义 */</span><span class="sy4">;</span>
      <span class="kw1">using</span> iterator        <span class="sy1">=</span> const_iterator<span class="sy4">;</span>
      <span class="kw1">using</span> difference_type <span class="sy1">=</span> <span class="kw1">typename</span> iterator_traits<span class="sy1">&lt;</span>BiIt<span class="sy1">&gt;</span><span class="sy4">::</span><span class="me2">difference_type</span><span class="sy4">;</span>
      <span class="kw1">using</span> size_type       <span class="sy1">=</span> <span class="kw1">typename</span> allocator_traits<span class="sy1">&lt;</span>Allocator<span class="sy1">&gt;</span><span class="sy4">::</span><span class="me2">size_type</span><span class="sy4">;</span>
      <span class="kw1">using</span> allocator_type  <span class="sy1">=</span> Allocator<span class="sy4">;</span>
      <span class="kw1">using</span> char_type       <span class="sy1">=</span> <span class="kw1">typename</span> iterator_traits<span class="sy1">&lt;</span>BiIt<span class="sy1">&gt;</span><span class="sy4">::</span><span class="me2">value_type</span><span class="sy4">;</span>
      <span class="kw1">using</span> string_type     <span class="sy1">=</span> basic_string<span class="sy1">&lt;</span>char_type<span class="sy1">&gt;</span><span class="sy4">;</span>
 
      <span class="co1">// 构造/复制/销毁</span>
      match_results<span class="br0">(</span><span class="br0">)</span> <span class="sy4">:</span> match_results<span class="br0">(</span>Allocator<span class="br0">(</span><span class="br0">)</span><span class="br0">)</span> <span class="br0">{</span><span class="br0">}</span>
      <span class="kw1">explicit</span> match_results<span class="br0">(</span><span class="kw4">const</span> Allocator<span class="sy3">&amp;</span><span class="br0">)</span><span class="sy4">;</span>
      match_results<span class="br0">(</span><span class="kw4">const</span> match_results<span class="sy3">&amp;</span> m<span class="br0">)</span><span class="sy4">;</span>
      match_results<span class="br0">(</span>match_results<span class="sy3">&amp;&amp;</span> m<span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span>
      match_results<span class="sy3">&amp;</span> operator<span class="sy1">=</span><span class="br0">(</span><span class="kw4">const</span> match_results<span class="sy3">&amp;</span> m<span class="br0">)</span><span class="sy4">;</span>
      match_results<span class="sy3">&amp;</span> operator<span class="sy1">=</span><span class="br0">(</span>match_results<span class="sy3">&amp;&amp;</span> m<span class="br0">)</span><span class="sy4">;</span>
      ~match_results<span class="br0">(</span><span class="br0">)</span><span class="sy4">;</span>
 
      <span class="co1">// 状态</span>
      <span class="kw4">bool</span> ready<span class="br0">(</span><span class="br0">)</span> <span class="kw4">const</span><span class="sy4">;</span>
 
      <span class="co1">// 大小</span>
      size_type size<span class="br0">(</span><span class="br0">)</span> <span class="kw4">const</span><span class="sy4">;</span>
      size_type max_size<span class="br0">(</span><span class="br0">)</span> <span class="kw4">const</span><span class="sy4">;</span>
      <span class="br0">[</span><span class="br0">[</span>nodiscard<span class="br0">]</span><span class="br0">]</span> <span class="kw4">bool</span> empty<span class="br0">(</span><span class="br0">)</span> <span class="kw4">const</span><span class="sy4">;</span>
 
      <span class="co1">// 元素访问</span>
      difference_type length<span class="br0">(</span>size_type sub <span class="sy1">=</span> <span class="nu0">0</span><span class="br0">)</span> <span class="kw4">const</span><span class="sy4">;</span>
      difference_type position<span class="br0">(</span>size_type sub <span class="sy1">=</span> <span class="nu0">0</span><span class="br0">)</span> <span class="kw4">const</span><span class="sy4">;</span>
      string_type str<span class="br0">(</span>size_type sub <span class="sy1">=</span> <span class="nu0">0</span><span class="br0">)</span> <span class="kw4">const</span><span class="sy4">;</span>
      const_reference operator<span class="br0">[</span><span class="br0">]</span><span class="br0">(</span>size_type n<span class="br0">)</span> <span class="kw4">const</span><span class="sy4">;</span>
 
      const_reference prefix<span class="br0">(</span><span class="br0">)</span> <span class="kw4">const</span><span class="sy4">;</span>
      const_reference suffix<span class="br0">(</span><span class="br0">)</span> <span class="kw4">const</span><span class="sy4">;</span>
      const_iterator begin<span class="br0">(</span><span class="br0">)</span> <span class="kw4">const</span><span class="sy4">;</span>
      const_iterator end<span class="br0">(</span><span class="br0">)</span> <span class="kw4">const</span><span class="sy4">;</span>
      const_iterator cbegin<span class="br0">(</span><span class="br0">)</span> <span class="kw4">const</span><span class="sy4">;</span>
      const_iterator cend<span class="br0">(</span><span class="br0">)</span> <span class="kw4">const</span><span class="sy4">;</span>
 
      <span class="co1">// 格式</span>
      <span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> OutputIt<span class="sy1">&gt;</span>
        OutputIt
          format<span class="br0">(</span>OutputIt out,
                 <span class="kw4">const</span> char_type<span class="sy2">*</span> fmt_first, <span class="kw4">const</span> char_type<span class="sy2">*</span> fmt_last,
                 regex_constants<span class="sy4">::</span><span class="me2">match_flag_type</span> flags <span class="sy1">=</span>
                   regex_constants<span class="sy4">::</span><span class="me2">format_default</span><span class="br0">)</span> <span class="kw4">const</span><span class="sy4">;</span>
      <span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> OutputIt, <span class="kw1">class</span> ST, <span class="kw1">class</span> SA<span class="sy1">&gt;</span>
        OutputIt
          format<span class="br0">(</span>OutputIt out,
                 <span class="kw4">const</span> basic_string<span class="sy1">&lt;</span>char_type, ST, SA<span class="sy1">&gt;</span><span class="sy3">&amp;</span> fmt,
                 regex_constants<span class="sy4">::</span><span class="me2">match_flag_type</span> flags <span class="sy1">=</span>
                   regex_constants<span class="sy4">::</span><span class="me2">format_default</span><span class="br0">)</span> <span class="kw4">const</span><span class="sy4">;</span>
      <span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> ST, <span class="kw1">class</span> SA<span class="sy1">&gt;</span>
        basic_string<span class="sy1">&lt;</span>char_type, ST, SA<span class="sy1">&gt;</span>
          format<span class="br0">(</span><span class="kw4">const</span> basic_string<span class="sy1">&lt;</span>char_type, ST, SA<span class="sy1">&gt;</span><span class="sy3">&amp;</span> fmt,
                 regex_constants<span class="sy4">::</span><span class="me2">match_flag_type</span> flags <span class="sy1">=</span>
                   regex_constants<span class="sy4">::</span><span class="me2">format_default</span><span class="br0">)</span> <span class="kw4">const</span><span class="sy4">;</span>
      string_type
        format<span class="br0">(</span><span class="kw4">const</span> char_type<span class="sy2">*</span> fmt,
               regex_constants<span class="sy4">::</span><span class="me2">match_flag_type</span> flags <span class="sy1">=</span>
                 regex_constants<span class="sy4">::</span><span class="me2">format_default</span><span class="br0">)</span> <span class="kw4">const</span><span class="sy4">;</span>
 
      <span class="co1">// 分配器</span>
      allocator_type get_allocator<span class="br0">(</span><span class="br0">)</span> <span class="kw4">const</span><span class="sy4">;</span>
 
      <span class="co1">// 交换</span>
      <span class="kw4">void</span> swap<span class="br0">(</span>match_results<span class="sy3">&amp;</span> that<span class="br0">)</span><span class="sy4">;</span>
    <span class="br0">}</span><span class="sy4">;</span>
<span class="br0">}</span></pre></div></div>

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